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Oleg Nesterov fb4214db50 llist: fix/simplify llist_add() and llist_add_batch() 
1. This is mostly theoretical, but llist_add*() need ACCESS_ONCE().

   Otherwise it is not guaranteed that the first cmpxchg() uses the
   same value for old_entry and new_last->next.

2. These helpers cache the result of cmpxchg() and read the initial
   value of head->first before the main loop. I do not think this
   makes sense. In the likely case cmpxchg() succeeds, otherwise
   it doesn't hurt to reload head->first.

   I think it would be better to simplify the code and simply read
   ->first before cmpxchg().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2013-07-13 13:29:24 +04:00
..
fonts
lib: Move fonts from drivers/video/console/ to lib/fonts/
2013-06-28 10:28:22 +02:00
lzo
lib/lzo: Update LZO compression to current upstream version
2013-02-20 19:36:01 +01:00
mpi
lib/mpi/mpicoder.c: looping issue, need stop when equal to zero, found by 'EXTRA_FLAGS=-W'.
2013-06-12 16:29:44 -07:00
raid6
lib/raid6: build proper files on corresponding arch
2012-12-13 19:51:04 +11:00
reed_solomon
…
xz
decompressors: fix typo "POWERPC"
2013-03-13 15:21:48 -07:00
zlib_deflate
zlib: slim down zlib_deflate() workspace when possible
2011-03-22 17:44:17 -07:00
zlib_inflate
inflate_fast: sout is already a short so ptr arith was off by one.
2010-03-12 15:52:44 -08:00
.gitignore
X.509: Implement simple static OID registry
2012-10-08 13:50:18 +10:30
argv_split.c
argv_split(): teach it to handle mutable strings
2013-04-29 18:28:19 -07:00
asn1_decoder.c
Nothing all that exciting; a new module-from-fd syscall for those who want
2012-12-19 07:55:08 -08:00
atomic64_test.c
atomic64_test: simplify the #ifdef for atomic64_dec_if_positive() test
2012-07-30 17:25:16 -07:00
atomic64.c
lib: atomic64: Initialize locks statically to fix early users
2012-12-20 13:50:16 -08:00
audit.c
audit: support the "standard" <asm-generic/unistd.h>
2011-05-04 14:41:28 -04:00
average.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
bcd.c
usb/core: use bin2bcd() for bcdDevice in RH
2012-09-10 11:13:16 -07:00
bch.c
lib: add shared BCH ECC library
2011-03-11 14:25:50 +00:00
bitmap.c
propagate name change to comments in kernel source
2012-12-06 10:39:54 +01:00
bitrev.c
…
bsearch.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
btree.c
btree: catch NULL value before it does harm
2012-06-07 14:43:55 -07:00
bug.c
taint: add explicit flag to show whether lock dep is still OK.
2013-01-21 17:17:57 +10:30
build_OID_registry
X.509: do not emit any informational output
2013-06-19 17:54:06 +02:00
bust_spinlocks.c
printk: Provide a wake_up_klogd() off-case
2013-03-22 16:41:20 -07:00
check_signature.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
checksum.c
asm-generic headers: Allow yet more arch overrides in checksum.h
2013-02-11 20:00:33 +05:30
clz_tab.c
lib: Fix multiple definitions of clz_tab
2012-02-02 10:34:23 +11:00
cmdline.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
cordic.c
Docs: wording: functions -> algorithm
2011-10-29 21:20:22 +02:00
cpu_rmap.c
lib: cpu_rmap: avoid flushing all workqueues
2013-01-11 14:54:54 -08:00
cpu-notifier-error-inject.c
cpu: rewrite cpu-notifier-error-inject module
2012-07-30 17:25:22 -07:00
cpumask.c
bootmem: fix wrong call parameter for free_bootmem()
2012-12-11 17:22:28 -08:00
crc7.c
…
crc8.c
lib: crc8: add new library module providing crc8 algorithm
2011-06-03 15:01:06 -04:00
crc16.c
…
crc32.c
sections: fix const sections for crc32 table
2012-10-06 03:04:46 +09:00
crc32defs.h
crc32: select an algorithm via Kconfig
2012-03-23 16:58:38 -07:00
crc-ccitt.c
…
crc-itu-t.c
…
crc-t10dif.c
…
ctype.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
debug_locks.c
mutex: Add support for wound/wait style locks
2013-06-26 12:10:56 +02:00
debugobjects.c
hlist: drop the node parameter from iterators
2013-02-27 19:10:24 -08:00
dec_and_lock.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
decompress_bunzip2.c
decompress_bunzip2: remove invalid vi modeline
2011-12-06 10:00:05 +01:00
decompress_inflate.c
decompressors: check input size in decompress_inflate.c
2011-01-13 08:03:25 -08:00
decompress_unlzma.c
treewide: Fix comment and string typo 'bufer'
2011-12-06 09:53:40 +01:00
decompress_unlzo.c
lib/lzo: Rename lzo1x_decompress.c to lzo1x_decompress_safe.c
2013-02-20 19:36:00 +01:00
decompress_unxz.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
decompress.c
lib/decompress.c: fix initconst
2013-04-30 17:04:09 -07:00
devres.c
lib/devres.c: fix misplaced #endif
2013-02-27 19:10:09 -08:00
digsig.c
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2013-02-21 08:18:12 -08:00
div64.c
Revert "math64: New div64_u64_rem helper"
2013-04-30 19:13:05 +02:00
dma-debug.c
dma-debug: update DMA debug API to better handle multiple mappings of a buffer
2013-03-22 16:41:20 -07:00
dump_stack.c
dump_stack: serialize the output from dump_stack()
2013-07-03 16:07:41 -07:00
dynamic_debug.c
dynamic_debug: reuse generic string_unescape function
2013-04-30 17:04:03 -07:00
dynamic_queue_limits.c
bql: Avoid possible inconsistent calculation.
2012-05-31 18:18:17 -04:00
earlycpio.c
lib: Add early cpio decoder
2012-09-30 18:02:20 -07:00
extable.c
module: trim exception table on init free.
2009-06-12 21:47:04 +09:30
fault-inject.c
debugfs: add get/set for atomic types
2013-06-03 13:55:01 -07:00
fdt_ro.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_rw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_strerror.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_sw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_wip.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
find_last_bit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
find_next_bit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
flex_array.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
flex_proportions.c
lib/flex_proportions.c: fix corruption of denominator in flexible proportions
2012-09-25 08:59:21 -07:00
gcd.c
lib/gcd.c: prevent possible div by 0
2012-10-06 03:04:57 +09:00
gen_crc32table.c
sections: fix const sections for crc32 table
2012-10-06 03:04:46 +09:00
genalloc.c
genalloc: add devres support, allow to find a managed pool by device
2013-04-29 18:28:13 -07:00
halfmd4.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
hexdump.c
dynamic_debug: dynamic hex dump
2013-01-17 12:19:09 -08:00
hweight.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
idr.c
idr: print a stack dump after ida_remove warning
2013-07-03 16:08:04 -07:00
inflate.c
MN10300: Don't try and #include <linux/slab.h> in lib/inflate.c from bootloader
2010-08-12 09:51:35 -07:00
int_sqrt.c
lib/int_sqrt.c: optimize square root algorithm
2013-04-29 18:28:19 -07:00
interval_tree_test_main.c
random32: rename random32 to prandom
2012-12-17 17:15:26 -08:00
interval_tree.c
mm: interval tree updates
2012-10-09 16:22:40 +09:00
iomap_copy.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iomap.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iommu-helper.c
The following text was taken from the original review request:
2012-03-24 10:24:31 -07:00
ioremap.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iovec.c
Hoist memcpy_fromiovec/memcpy_toiovec into lib/
2013-05-20 10:24:22 +09:30
irq_regs.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
is_single_threaded.c
kernel: is_current_single_threaded: don't use ->mmap_sem
2009-07-17 09:11:31 +10:00
jedec_ddr_data.c
ddr: add LPDDR2 data from JESD209-2
2012-05-02 00:04:06 -07:00
kasprintf.c
lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for kvasprintf
2012-10-11 08:50:15 +09:00
Kconfig
Merge branch 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
2013-07-03 11:12:08 -07:00
Kconfig.debug
Merge branch 'kconfig-diet' from Dave Hansen
2013-07-04 11:25:51 -07:00
Kconfig.kgdb
treewide: Fix typo in printk
2013-06-18 13:48:45 +02:00
Kconfig.kmemcheck
kmemcheck: depend on HAVE_ARCH_KMEMCHECK
2009-07-01 22:28:44 +02:00
kfifo.c
kfifo: fix kfifo_alloc() and kfifo_init()
2013-02-27 19:10:23 -08:00
klist.c
klist: del waiter from klist_remove_waiters before wakeup waitting process
2013-05-21 10:16:39 -07:00
kobject_uevent.c
netlink: hide struct module parameter in netlink_kernel_create
2012-09-08 18:46:30 -04:00
kobject.c
kobject: sanitize argument for format string
2013-06-07 16:05:50 -07:00
kstrtox.c
kstrto*: add documentation
2012-12-17 17:15:22 -08:00
kstrtox.h
lib/kstrtox: common code between kstrto*() and simple_strto*() functions
2011-10-31 17:30:56 -07:00
lcm.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
libcrc32c.c
libcrc32c: Fix "crc32c undefined" compilation error
2008-12-25 11:01:42 +11:00
list_debug.c
rcu: Fix broken strings in RCU's source code.
2012-07-06 06:01:49 -07:00
list_sort.c
lib/: rename random32() to prandom_u32()
2013-04-29 18:28:42 -07:00
llist.c
llist: fix/simplify llist_add() and llist_add_batch()
2013-07-13 13:29:24 +04:00
locking-selftest-hardirq.h
…
locking-selftest-mutex.h
…
locking-selftest-rlock-hardirq.h
…
locking-selftest-rlock-softirq.h
…
locking-selftest-rlock.h
…
locking-selftest-rsem.h
…
locking-selftest-softirq.h
…
locking-selftest-spin-hardirq.h
…
locking-selftest-spin-softirq.h
…
locking-selftest-spin.h
…
locking-selftest-wlock-hardirq.h
…
locking-selftest-wlock-softirq.h
…
locking-selftest-wlock.h
…
locking-selftest-wsem.h
…
locking-selftest.c
locking-selftests: Handle unexpected failures more strictly
2013-06-26 12:10:59 +02:00
lru_cache.c
lru_cache: introduce lc_get_cumulative()
2013-03-22 22:17:36 -06:00
Makefile
Merge branch 'exotic-arch-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
2013-07-03 11:12:08 -07:00
md5.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
memory-notifier-error-inject.c
memory: memory notifier error injection module
2012-07-30 17:25:22 -07:00
memweight.c
string: introduce memweight()
2012-07-30 17:25:16 -07:00
net_utils.c
net: core: move mac_pton() to lib/net_utils.c
2013-06-05 12:00:27 -07:00
nlattr.c
netlink: add minlen validation for the new signed types
2012-08-30 13:11:46 -04:00
notifier-error-inject.c
mode_t, whack-a-mole at 11...
2013-04-09 14:13:05 -04:00
notifier-error-inject.h
fault-injection: notifier error injection
2012-07-30 17:25:22 -07:00
of-reconfig-notifier-error-inject.c
powerpc+of: Rename and fix OF reconfig notifier error inject module
2012-12-14 10:32:52 +11:00
oid_registry.c
Give the OID registry file module info to avoid kernel tainting
2013-05-05 14:38:00 -07:00
parser.c
lib/parser.c: fix up comments for valid return values from match_number
2013-02-21 17:22:25 -08:00
pci_iomap.c
lib: add NO_GENERIC_PCI_IOPORT_MAP
2012-01-31 23:19:47 +02:00
percpu_counter.c
lib/percpu_counter.c: __this_cpu_write() doesn't need to be protected by spinlock
2013-07-03 16:07:43 -07:00
percpu-refcount.c
percpu-refcount: use RCU-sched insted of normal RCU
2013-06-16 16:12:26 -07:00
percpu-rwsem.c
percpu_rw_semaphore: add lockdep annotations
2012-12-17 17:15:18 -08:00
plist.c
lib/plist.c: make plist test announcements KERN_DEBUG
2012-10-06 03:04:58 +09:00
pm-notifier-error-inject.c
PM: PM notifier error injection module
2012-07-30 17:25:22 -07:00
prio_heap.c
lib: fix sparse shadowed variable warning
2009-01-06 15:59:11 -08:00
proportions.c
locking, lib/proportions: Annotate prop_local_percpu::lock as raw
2011-09-13 11:11:50 +02:00
radix-tree.c
radix-tree: fix contiguous iterator
2012-06-05 10:46:40 -07:00
random32.c
prandom: introduce prandom_bytes() and prandom_bytes_state()
2012-12-17 17:15:26 -08:00
ratelimit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
rational.c
lib: Change mail address of Oskar Schirmer
2012-05-17 15:18:37 +02:00
rbtree_test.c
rbtree_test: add __init/__exit annotations
2013-04-30 17:04:07 -07:00
rbtree.c
lib/rbtree.c: avoid the use of non-static __always_inline
2013-01-11 14:54:56 -08:00
reciprocal_div.c
sch_red: Adaptative RED AQM
2011-12-08 19:52:43 -05:00
rwsem-spinlock.c
rwsem: simplify __rwsem_do_wake
2013-05-07 07:20:16 -07:00
rwsem.c
rwsem: check counter to avoid cmpxchg calls
2013-05-07 16:11:51 -07:00
scatterlist.c
lib/scatterlist: sg_page_iter: support sg lists w/o backing pages
2013-03-27 17:13:44 +01:00
sha1.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
show_mem.c
mm, show_mem: suppress page counts in non-blockable contexts
2013-04-29 15:54:28 -07:00
smp_processor_id.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
sort.c
generic swap(): lib/sort.c: rename swap to swap_func
2009-01-08 08:31:14 -08:00
spinlock_debug.c
lib/spinlock_debug: avoid livelock in do_raw_spin_lock()
2012-10-06 03:04:57 +09:00
stmp_device.c
lib: add support for stmp-style devices
2012-04-20 23:27:08 +02:00
string_helpers.c
lib/string_helpers: introduce generic string_unescape
2013-04-30 17:04:03 -07:00
string.c
The following text was taken from the original review request:
2012-03-24 10:24:31 -07:00
strncpy_from_user.c
word-at-a-time: make the interfaces truly generic
2012-05-26 11:33:40 -07:00
strnlen_user.c
lib: Fix generic strnlen_user for 32-bit big-endian machines
2012-05-27 20:59:46 -07:00
swiotlb.c
x86, kdump: Set crashkernel_low automatically
2013-04-17 12:35:32 -07:00
syscall.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
test-kstrtox.c
lib/test-kstrtox.c: mark const init data with __initconst instead of __initdata
2012-05-29 16:22:32 -07:00
test-string_helpers.c
lib/string_helpers: introduce generic string_unescape
2013-04-30 17:04:03 -07:00
textsearch.c
textsearch: doc - fix spelling in lib/textsearch.c.
2011-01-24 23:33:30 -08:00
timerqueue.c
The following text was taken from the original review request:
2012-03-24 10:24:31 -07:00
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
…
ucs2_string.c
Move utf16 functions to kernel core and rename
2013-04-15 21:23:03 +01:00
usercopy.c
Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
2013-04-30 17:04:09 -07:00
uuid.c
uuid: use prandom_bytes()
2013-04-29 18:28:42 -07:00
vsprintf.c
sprintf: hex_string(): fix comment
2013-05-29 01:14:46 +02:00